The embryonic germ layer that is the source of connective tissue and muscle is
A. exoderm.
B. neuroectoderm.
C. endoderm.
D. ectoderm.
E. mesoderm.
E
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All of the following are characteristics of epithelial tissues, except
A. they all contain a basement membrane on their underside. B. they are well-supplied with blood vessels. C. their apical surface faces the outside or an internal body surface. D. the cells are densely packed, with little space between them. E. they can be composed of a single layer or multiple layers of cells.
The major types of veins are ____________, ____________, and ______
A. superficial veins, sinuses, and anastomoses B. anastomoses, trunks, and sinuses C. superficial veins, deep veins, and anastomoses D. deep veins, trunks, and sinuses E. superficial veins, deep veins, and sinuses
The proliferative phase of the menstrual (uterine) cycle is
a. occurring when the ovarian cycle is in the follicular phase b. from the time of menstruation to the time of ovulation c. occurring when the endometrium is repairing itself and thickening under the influence of estrogen d. both b and c e. all of the above
Most organic solutes cross epithelial membranes by simple diffusion on the lumen side followed by active transport across the blood side of the membrane.
Answer the following statement true (T) or false (F)